高电压技术2012，Vol.38Issue(8)：2129-2136,8.
多柱芯体并联结构避雷器暂态热特性计算方法
Calculation Method for Transient Thermal Characteristics of Multi-column Parallel Structure Surge Arrester
摘要
Abstract
The multi-column parallel structure surge arrester has widely been applied in the UHV system and series capacitor compensation device.The operation reliability of surge arrester is directly determined by its transient thermal characteristics.The reasonable design is urgently needed to insure the excellent transient thermal reliability of surge arrester.Consequently,we investigated the calculation method for transient thermal characteristics of multi-column parallel structure surge arrester,analyzed the method of calculating transient temperature rise,and presented the initial conditions of surge arrester heat dissipation.Moreover,according to the temperature field equation in the course of surge arrester heat dissipation,we established the calculation model of multi-column structure surge arrester heat dissipation thermal characteristics by utilizing the three-dimensional finite element method.The transient temperature rise test and calculation were implemented in a designed proportion unit surge arrester.The 2ms square wave current test method was utilized to inject large energy into the core in a relatively short time in order to simulate the surge arrester transient temperature rise in actual system.The temperature rise was measured in each test.Furthermore,a four-column parallel structure surge arrester was constructed.The heat dissipation thermal characteristics test and calculation were carried out in the surge arrester.The power frequency current method was carried out for surge arrester sample heating in test.The fiber Bragg grating sensors were used to measure the surge arrester temperature changes during the heat dissipation process.The comparison results show that the calculation of transient temperature rise is higher than the measured temperature rise,the error of calculated and measured results is within 5%,and the transient temperature rise calculation method is effective.Compared with the test results,the calculation results of heat dissipation thermal characteristics are higher,and the errors are less than 5%.The validity of the surge arrester natural cooling characteristics calculation utilizing calculation method for transient thermal characteristics of multi-column parallel structure surge arrester was verified.关键词
避雷器/多柱芯体并联结构/暂态温升/散热特性/三维有限元法/方波电流试验/工频电流法/光纤光栅传感器Key words
arrester/multi-column parallel structure/transient temperature rise/heat dissipation thermal characteristics/three-dimensional finite element method/square wave current test/power frequency current method/fiber Bragg grating sensors分类
信息技术与安全科学引用本文复制引用
贺子鸣,陈维江,陈秀娟,张搏宇,颜湘莲..多柱芯体并联结构避雷器暂态热特性计算方法[J].高电压技术,2012,38(8):2129-2136,8.基金项目
国家自然科学基金 （）
